"All bets off" is a colloquial phrase used to indicate that a situation has become uncertain and unpredictable. Some synonyms for this phrase are "uncertain outcome," "unknown territory," "up in the air," and "unpredictable circumstances." These phrases are often used when discussing situations where a certain outcome was expected, but unforeseen events have occurred, leaving the future uncertain. When a situation is described with these phrases, it means that all previous assumptions and predictions are no longer valid, and the outcome is now open to speculation. These synonyms are commonly used in sports, politics, and other areas where the outcome of events is uncertain.